Seasonal recession of Mars' South polar cap in 1986
Authors:
- Philip B. JamesPJPhilip B. James
- Leonard J. MartinLMLeonard J. Martin
- Jean R. HensonJHJean R. Henson
- Peter V. BirchPBPeter V. Birch
- 10 February 1990
- journal article
- Published by American Geophysical Union (AGU) in Journal of Geophysical Research
- Vol. 95 (B2) , 1337-1341
Abstract
Photographs of Mars obtained during the 1986 opposition of the planet have been used to derive the regression curve for the south polar cap between Ls = 190° and Ls = 255°. The 1986 regression appears to have been unexceptional until after Ls = 230°, when it becomes retarded relative to the normal established by the 1971 and 1977 regressions. A study of the data as a function of the filter used suggests that circumpolar clouds were present in early spring, unlike the case in the 1977 recession.Keywords
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